Bug 101572

Summary:	kernel ptrace bug
Product:	Red Hat Enterprise Linux 2.1	Reporter:	Milan Brabec <milan.brabec>
Component:	kernel	Assignee:	Larry Woodman <lwoodman>
Status:	CLOSED NOTABUG	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	2.1	CC:	petr.sava, riel
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2003-08-04 15:23:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Milan Brabec 2003-08-04 08:13:10 UTC

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Description of problem:
The latest kernel from RHEN updates (kernel 2.4.9-e.25.smp) is still vulnerable
to ptrace exploit (from march 2003), available e.g. from
http://hysteria.sk/sd/p.c. We have checked that some form of ptrace patch is
included in the src.rpm package.

Version-Release number of selected component (if applicable):
kernel 2.4.9-e.25.smp

How reproducible:
Always

Steps to Reproduce:
1. login as normal user 
2. compile ptrace_exploit.c
3. run ./ptrace_exploit

    

Actual Results:  you've got root's shell

Expected Results:  ptrace exploit shouldn't get root's priviledges 

Additional info:

Comment 1 Arjan van de Ven 2003-08-04 08:28:51 UTC

be careful; if you tested this exploit before you updated the kernel as well, it
will have made itself setuid root..... so it appears to have succeeded.
Is this the case ?

Comment 2 Milan Brabec 2003-08-04 08:50:13 UTC

Yes, we have had the binary setuid root. Sorry.